Cover wrench



Oct. 6, 1936. f M. GIESINGER 2,056,843

4 COVER WRENCH 4 Filed Sept. 26, 1934 INVENTOIZ ATTORNEY}.

Patented Oct. 6, 1936 UNITED STATES ATENT OFFICE COVER WRENCH MathildeGiesingerQNew York, N. Y.

Application September 26, 1934, Serial No. 745,500

1 Claim.

This invention relates to improvements in cover wrenches, beingparticularly directed to a device applicable for loosening andtightening screw type or friction covers for jars.

Broadly, it is an object of this invention to provide a cover wrenchincorporating a plurality of jaws, one fixed and one movable, adapted toperipherally engage a cover of the screw or friction type to loosen ortighten the same with respect to the jar on which it is disposed, themovable jaw being reciprocable with respect to the fixed jaw through thelongitudinal movement of the wrench handle upon rotation of the latter.

Specifically, it is an object of this invention to provide for a coverwrench incorporating fixed and movable jaws, the said movable jaw beingreciprocable along a guide through the actuation of the rotatablehandle, such handle or a part thereof being interiorly threaded tocooperate with threads on a jaw support, whereby upon rotation thehandle simultaneously is longitudinally displaced.

These and other advantages, capabilities and features of the inventionwill appear from the subjoined detailed description of one specificembodiment thereof, illustrated in the accompanying drawing, in whichFigure 1 is a side elevation partly in section showing the wrench.

Figure 2 is a plan view partly in section of the device.

Figure 3 is an end view in section taken along lines 3-3 of Figure 1.

Figure 4 is a side elevation partly in section of a modified form ofdevice.

Referring to the reference characters in the drawing, numeral I0represents the wrench shank rectangular in cross-section, as shown inFigure 3, and having mounted at one end thereof a fixed gripping jaw lI, said jaw comprising a body portion l2, through which pass fasteningmeans I3, for attaching the gripping jaw to the shank I0 and having aplurality of Wings 14 and I4 extending therefrom, such wings havingserrated gripping portions I5. As shown in Figures 1 and 2 the grippingjaw H is so formed as to provide for an offset of the wings I4 and Mwith respect to the body l 2, thereby to provide for disposal at aconsiderable depth of the gripping members with respect to the top ofthe cover to be acted on.

The shank is threaded from a point distant to the end thereof carryingthe fixed gripper jaw to its other end, as at is, and on the shank thereis disposed movable jaw I! having a body portion l8 and offset wingportions I 9 and I 9 similar in formation and relation with respect tothe body l8 as are the wings M and M with respect to the body I2, thewings of the movable gripper jaw being oppositely directed to those onthe fixed jaw. Integral with body 18 of the movable gripper jaw H isformed guide 20, the construction of which is that of a substantialright angle as indicated in Figure 3, the respective interior peripheralsurface of which is disposed adjacent the peripheral surface of thethreaded portion l6 of the shank l0, there being provided a slidable fitbetween the guide and the shank. Cooperating with the threaded free endof the shank [0 there is provided a handle 2!, the interior of which isgrooved to provide a thread 22 circular in formation, such thread beingof the same pitch as the thread on the shank, whereby rotation of thehandle with respect to the shank will cause a reciprocation of thehandle with respect to the shank, the open end of the handle as at 23having formed therein a bearing surface adapted to contact with the end24 of the guide member 20, thereby to cause a longitudinal reciprocationof the guide member carrying the movable gripping jaw with respect tothe shank upon rotation of the handle.

It should be noted in the form shown in Figures 1 to 3, that the movablejaw incorporating the guide 20 is freely slidable on the shank l0 andcan be displaced along the shank at the threaded or non-threadedportions thereof by mere physical manipulation, independent of theactuation of the handle. This feature is provided so that when covers ofvarious sizes are involved, as is commonly found in householdoperations, the movable gripping jaw may be rapidly displaced along theshank so as to form a temporary grip, after which the handle is rotatedabout the shank to cause upon the handles longitudinal movement thecontact of the bearing at the open end thereof with the end of the guideon the gripper member, thereby to transmit displacement and pressureupon further actuation of the handle to firmly lock the movable gripperjaw in conjunction with the fixed gripper jaw to a cover. It should benoted in this modification, that the handle may displace the movablegripper jaw towards the fixed gripper jaw upon actuation thereof, butthat the movable gripper jaw is not returned or directed away from thefixed gripper jaw by rotation of the handle in a direction opposite toits locking movement.

To provide for a displacement of the movable gripper jaw in bothdirections with respect to the fixed gripper jaw, there is shown inFigure 4 a modification incorporating a lug or projection 25 dependingfrom the movable jaw carrying a pin 26 angularly disposed with respectthereto, which pin is adapted to ride in groove 21 formed on the innerperiphery of handle 23 adjacent the open end thereof. Through theprovision of this locking mechanism the movable gripping jaw is directlyinterlocked with the handle, thereby to provide for reciprocation of themovable gripping jaw with respect to the fixed gripping jaw uponrelative displacement in opposite directions of the handle, uponrotation of the same with respect to the shank. 7

It is obvious that various changes and modifications may be made to thedetails of construction without departing from the general spirit of theinvention as set forth in the appended claim.

I claim: In a device of the class described, a shank, a

gripping member fixed at one end thereof, a movable gripping memberslidable along said shank, threads formed on the free end of said shank,a hollow handle interiorly threaded to cooperate with the threads ofsaid shank, whereby rotation of said handle with respect to said shankcauses longitudinal reciprocation of said handle, a movable grippingmember slidable along said shank and disposed between the fixed grippingmember and said handle, guide means integral with said movable grippingmember, and forming a sleeve with respect to said shank, means forinterlocking said movable gripping member with said handle, wherebyreciprocation of said handle upon rotation thereof with respect to theshank produces reciprocation of the movable gripping member with respectto the fixed gripping memher, said means comprising a projectionextending from said movable gripping member disposed in a peripheralgroove formed interiorly of said handle.

MATHILDE GIESINGER.

